WO2014192129A1 - ベンディングプレス機における金型交換方法と金型台車 - Google Patents
ベンディングプレス機における金型交換方法と金型台車 Download PDFInfo
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- WO2014192129A1 WO2014192129A1 PCT/JP2013/065141 JP2013065141W WO2014192129A1 WO 2014192129 A1 WO2014192129 A1 WO 2014192129A1 JP 2013065141 W JP2013065141 W JP 2013065141W WO 2014192129 A1 WO2014192129 A1 WO 2014192129A1
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- Prior art keywords
- mold
- punch
- die
- press machine
- dies
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
- B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/16—Making tubes with varying diameter in longitudinal direction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/14—Particular arrangements for handling and holding in place complete dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/026—Mounting of dies, platens or press rams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/028—Loading or unloading of dies, platens or press rams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
Definitions
- the present invention relates to a method for exchanging a die at a punch tip in a bending press machine for producing a large-diameter and thick welded steel pipe used for a line pipe or the like by three-time bending press molding, and exchanging the die. It relates to a mold carriage used in
- FIG. 1 is a diagram schematically illustrating a method of manufacturing a steel pipe by the press bend method.
- this manufacturing method first, a plurality of punches 2 and a pair of dies 3 are combined from one plate width end portion of the material steel plate 1 having both width end portions bent (crimping press) toward the plate width center. Three-point bending press forming was performed, and one half of the steel sheet except the center of the sheet width was formed into an arc shape (first half press), and then similarly, multiple times from the other sheet width end toward the sheet width center. The other half of the steel sheet except the center of the sheet width is formed into an arc shape to form a substantially C shape (second half press), and finally, the remaining center part of the sheet width is press formed.
- it is manufactured by making (substantially pressing) an approximately cylindrical shape (open tube) having an opening, and then welding the opening by butting. Note that end bending may not be applied to the material steel plate.
- the bending press machine used for the above three-point bending press forming has a pair of dies arranged at a predetermined interval in the feed direction of the raw steel plate, and a punch capable of moving up and down between the pair of dies.
- the material steel plate placed on the die is pressed by the punch to bend.
- the punch is connected to a die (hereinafter simply referred to as “die”) attached to the tip of the punch 2 that is in direct contact with a steel plate as a workpiece, and the die is connected to the press machine body.
- die hereinafter simply referred to as “die”
- it is comprised from the punch support body (henceforth "beam”) hold
- the beam is a unitary object, the mold is usually composed of a plurality of segments so that attachment and detachment work and handling are easy.
- the roundness is increased or the productivity is increased by increasing the tip R in accordance with the diameter of the steel pipe and widening the punch as shown in FIG. Things have been done.
- the punch width is widened or the tip R is increased as described above, the roundness and productivity are improved, but the die can be frequently changed according to changes in the steel pipe size and material strength. Necessary.
- the width of the mold is widened, not only the load required for pressing is increased, but also the feed amount of the steel sheet is small with respect to the distance between the dies, and the shape of the raw steel sheet on the die is relative to the punch axis.
- the dummy plate is horizontally placed using a transport facility for supplying a raw steel plate to a breather. Then, move the new die to the position immediately below the punch (beam), and then lower the punch to bring it into contact with the dummy plate near the new die, and release the bolts. Remove the mold from the beam tip, then move the dummy plate with the transfer equipment described above to move the new mold directly under the beam, fit the new mold to the beam tip, and fasten with the bolt It was done by a series of steps of attaching.
- the present invention has been made in view of the above-described problems of the prior art, and the object thereof is a metal mold that can efficiently and safely perform a die change at the punch tip in a bending press machine in a short time.
- an object is to provide a mold carriage used in the method.
- a mold carriage capable of collectively placing a plurality of divided mold segments is prepared, and the carriage is moved between a pair of dies below the press machine along the length direction of the punch. Therefore, it is possible to accurately position and supply the mold directly under the punch, and further, the carriage is moved using a steel pipe unloading device for unloading the steel pipe after the press forming in which the press machine is installed. Therefore, the present invention has been developed.
- the present invention is a method for exchanging a die at a punch tip in a bending press machine that bends a steel plate on a die with a pair of dies and a punch that moves up and down between the dies.
- the mold in the bending press machine is characterized in that the mold is carried in and the mold is unloaded from directly under the punch by placing it on a mold carriage movable between the pair of dies in the length direction of the punch. It is an exchange method.
- the method for exchanging molds according to the present invention is characterized in that the mold carriage is carried directly into and out of the punch using a steel pipe carry-out device disposed in the press machine.
- the mold accommodating portion of the mold carriage is lifted, and the mold is removed from the punch tip and the mold to the punch tip is in contact with the punch tip. It is characterized by attaching the mold.
- the position adjustment in the direction perpendicular to the punch length direction of the mold placed on the mold base in the mold storage unit is performed while the mold is placed. This is performed by moving the mold base.
- the mold exchanging method of the present invention is characterized in that when the mold is divided into a plurality of segments, the molds are exchanged collectively.
- the above-described mold exchanging method of the present invention is characterized in that a plurality of segments are divided into a plurality of sets connected by shims, and the mold cart is loaded and unloaded in units of the sets.
- the present invention is also a mold carriage used for exchanging a die at a punch tip in a bending press machine for bending a steel plate on a die with a pair of dies and a punch moving up and down between the dies.
- a die carriage for exchanging dies in a bending press machine characterized in that it is a device for unloading a steel pipe after press working installed in the machine, and is movable between the pair of dies in the length direction of the punch. It is.
- the mold carriage of the present invention is characterized in that it has a mold storage part for storing the mold and an elevating mechanism for raising and lowering the mold storage part.
- the mold carriage of the present invention includes a position adjustment mechanism that performs position adjustment in a direction perpendicular to the punch length direction of the mold stored in the mold storage unit for each mold base on which the mold is placed. It is characterized by having.
- the die exchange in the bending press machine can be performed efficiently in a short time, it is possible to produce a thick, long and high strength large-diameter welded steel pipe with high productivity. It becomes.
- the present invention relates to a method of exchanging a die attached to the tip of a punch support in a bending press machine that bends a steel plate on a die with a pair of dies and a punch that moves up and down between the dies.
- FIG. 3 is a diagram illustrating a punch structure of a bending press machine used in the present invention.
- the punch is composed of a punch support 4 (beam) attached to the press body 7 and a die 5 attached to the tip (lower end) of the beam by a fixing bolt 6.
- a groove 8 into which the lower end of the beam is fitted is formed on the side of the die that contacts the beam tip, and a spacer 9 is inserted between the groove and the beam tip.
- the above mold may be a single piece, it is usually divided into a plurality of segments in consideration of mold manufacturing and handling properties.
- the mold is transferred to the lower position of the press machine and unloaded from the lower position of the press machine by moving the mold on the dummy plate. Had gone by.
- the mold cannot be accurately positioned at the beam tip, and it takes a lot of time for mounting, which is a cause of hindering productivity.
- it is necessary to move the punch while the press machine is turned on, it is necessary to take multiple safety measures to ensure safety, and this has an unavoidable adverse effect on productivity. It was.
- the present invention provides a mold that moves in the length direction of the punch between a pair of dies installed at the lower part of the press machine for carrying in and unloading the mold directly under the punch. It was decided to place it on a trolley.
- the mold carriage is placed at a position different from that of the press machine during the pressing operation, and when exchanging the mold, a crane is provided on the carry-out line for carrying out the steel pipe (open pipe) after the press molding.
- the mold carriage has a length that allows the molds divided into a plurality of segments to be placed in a lump, and a connecting mechanism, for example, an upward-facing portion is provided at the end of the carriage in the length direction of the press machine.
- the steel pipe carrying-out device for carrying out the press-formed steel pipe provided in the press machine is provided with another connecting mechanism that connects with the connecting mechanism of the mold carriage, for example, a downward (or upward) hook. ing.
- the carry-in of the mold carriage from outside the press machine directly under the punch of the press machine is to connect the coupling mechanism on the mold carriage side and the coupling mechanism on the steel pipe carry-out device side, and when the steel pipe carry-out device is carried out of the steel pipe. Can be performed by moving in the opposite direction.
- the extrusion jig provided in the steel pipe carry-out device for carrying out the steel pipe after press molding is brought into contact with the die carriage, or This can be done by connecting the connecting mechanism on the mold carriage side and the connecting mechanism on the steel pipe carry-out device side and moving the steel pipe carry-out device in the steel pipe carry-out direction.
- the moving means (drive source) of the said steel pipe carrying-out apparatus For example, you may make it drive with the chain connected to motive power sources, such as a motor, or a belt.
- the mold trolley may run on a conveyance line composed of V rolls as shown by a broken line in the lower part of FIG. 4, for example, and wheels may be attached to the lower part of the mold trolley. You may make it run on a rail and may use them together, and there is no restriction in particular.
- V roll the V roll at the lower part of the press machine is lowered and retracted so as not to hinder the work during the press work, and is raised only at the time of changing the mold. It is preferable to do this.
- the mold carriage 10 includes a carriage base portion 11 and an upper mold storage portion 12.
- the mold storage section 12 has an H-shaped cross section in the width direction, and a mold base 13 on which a mold is placed is provided in the upper recess.
- position adjustment bolts 14 as position adjustment mechanisms for the mold base 13 are provided on both sides of the mold accommodating portion, and the molds in the recesses of the mold accommodating portion are rotated by rotating the bolts. The position in the width direction of the base 13 can be finely adjusted while the mold is placed. By using the position adjusting bolt 14, a new mold can be easily and quickly fitted to the tip of the punch support (beam) with high accuracy.
- the cart base 11 and the mold storage unit 12 are separated, and the mold storage unit 12 can be moved up and down by a hydraulic jack 15 as a lifting function arranged on the cart base side.
- a hydraulic jack 15 as a lifting function arranged on the cart base side.
- the mold exchanging work for example, when the operator performs the work of fastening the punch tip and the mold with the fixing bolt or releasing the fastening at the lower part of the press machine, Since there is no need to operate the mold, the mold can be exchanged more safely.
- Step 1 An empty mold carriage 10 is mounted on the steel pipe carry-out line 16 from the carriage yard (FIG. 5 (a)).
- Step 2 The steel pipe carry-out device 17 is moved to the position of the mold carriage 10 and connected (FIG. 5B).
- Step 3 The mold carriage 10 is moved to the position immediately below the punch 2 of the press machine 7 by the steel pipe carry-out device 17 (FIGS. 5C and 6A).
- Step 4 The mold storage part 12 at the upper part of the mold carriage is raised by the hydraulic jack 15, and the mold base 13 in the storage part and the mold 5 at the tip of the punch are brought into contact with each other (FIG. 5 (d), FIG. 6). (B)).
- Step 5 Release the fastening of the fixing bolt 6 and remove the die 5 from the punch tip (beam tip) (FIGS. 5 (d) and 6 (c)).
- Step 6 The mold storage unit 12 is lowered together with the mold 5 and received on the mold carriage base 11 (FIGS. 5 (e) and 6 (d)).
- Step 7 With the steel pipe carry-out device 17, the mold carriage 10 is pushed out of the press machine and placed on the steel pipe carry-out line 16 (FIG. 5 (f)).
- Step 8 The mold carriage 10 is removed from the steel pipe carry-out line 16.
- Step 1 A mold carriage 10 on which a new mold 5 is placed is mounted on a steel pipe carry-out line 16.
- Step 2 The steel pipe carry-out device 17 is moved to the position of the mold carriage 10 and connected.
- Step 3 The mold carriage 10 is moved to the position immediately below the punch 2 of the press machine 7 by the steel pipe carry-out device 17.
- Step 4 The mold accommodating part 12 at the upper part of the mold carriage is raised by the hydraulic jack 15, and the groove part 8 of the new mold 5 in the accommodating part and the punch support 4 (beam) tip are fitted.
- Step 5 Fasten the fixing bolt 6 and attach the mold 5 to the tip of the beam 4.
- Step 6 The mold storage unit 12 is lowered and received by the mold carriage base 11.
- Step 7 With the steel pipe carry-out device 17, the mold carriage 10 is pushed out and placed on the steel pipe carry-out line 16.
- Step 8 The mold carriage 10 is removed from the steel pipe carry-out line 16.
- the punch exchanging method in the bending press machine of the present invention is not to replace a plurality of segments individually, but as a whole in a batch when the mold is divided into a plurality of segments. It is preferable to carry out. However, when the mold is long, it may be difficult to place the mold on the mold carriage at once. In such a case, it is preferable to divide the mold composed of a plurality of segments into a plurality of sets obtained by connecting a plurality of small segments and place the molds on the mold carriage in units of the above sets.
- the set has a structure in which a parallel pin is embedded in the joint portion of each segment and the length of the spacer inserted into the groove portion 8 formed in the upper portion of the mold is fastened with a bolt as the set length.
- the connecting part of each set is such that the spacer of one set protrudes from the end of the set, and the spacer missing part into which the protruding spacer fits is provided at the end of the other set. It is preferable that they are connected via each other.
- FIG. 7 shows an example in which one mold divided into nine segments is divided into three sets composed of three segments.
- a prior art method using a dummy plate described in [0011] for exchanging a die of a bending press machine capable of producing a welded steel pipe having an outer diameter of 20 to 56 inches and a pipe thickness of 12.7 to 50.8 mm (Comparative example) and two methods of the mold exchange method (invention example) of the present invention were used, and the required time was compared.
- the metal mold has a total length of 13.5 m and is divided into nine segments as shown in FIG. 7, and handling was performed with three segments as one set.
- the die replacement time of the example of the present invention could be shortened to about 1/3 compared with the comparative example of the prior art.
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Abstract
Description
しかし、従来技術においては、図2(a)に示したように、鋼板と直接接する金型表面の曲率半径R(先端R)は比較的小さいものを使用していたため、鋼管サイズや素材鋼板の変化に対応できる範囲が広い反面、曲げ加工部が局部的となることから、成形後の鋼管の真円度に劣り、また、小刻みにプレス成形する必要があることから、プレス回数が多くなり、生産性に劣るという問題があった。
また、特許文献1~4に記載の方法は、小型の曲げ加工機やパンチプレス機にのみ用いることができる技術であり、大口径を製造するベンディングブレス機の金型交換にそのまま適用できる技術ではない。
図3は、本発明で用いるベンディングプレス機のパンチの構造を例示した図である。上記のパンチは、プレス機本体7に取り付けられたパンチ支持体4(ビーム)と、該ビームの先端(下端)に固定ボルト6によって取付けられた金型5とから構成されている。金型のビーム先端と当接する側には、ビーム下端部が嵌合する溝8が形成されており、該溝部とビーム先端との間には、スペーサー9が挿入されている。
そこで、本発明は、上記パンチ直下への金型の搬入および上記パンチ直下からの金型の搬出を、プレス機下部に設置された1対のダイ間をパンチの長さ方向に移動する金型台車に載置して行うこととした。
上記金型台車は、プレス作業中は、プレス機とは別の位置に置かれており、金型交換を行う際には、プレス成形後の鋼管(オープン管)を搬出する搬出ラインに、クレーン等で搭載する。上記金型台車は、複数のセグメントに分割された金型を一括して載置できる長さを有しており、その台車の長さ方向のプレス機側端部には連結機構、例えば、上向き(または下向き)のフックが設けられている。一方、プレス機に設けられているプレス成形後の鋼管を搬出する鋼管搬出装置には、上記金型台車の連結機構と連結する別の連結機構、例えば、下向き(または上向き)のフックが設けられている。
そして、上記金型台車のプレス機外からプレス機パンチ直下への搬入は、上記金型台車側の連結機構と鋼管搬出装置側の連結機構とを連結し、鋼管搬出装置を鋼管搬出のときとは逆方向に移動させることで行うことができる。
一方、上記金型台車のプレス機パンチ直下からプレス機外への搬出は、プレス成形後の鋼管を搬出するための鋼管搬出装置に設けられた押出治具を金型台車に当接し、あるいは上記金型台車側の連結機構と鋼管搬出装置側の連結機構とを連結し、鋼管搬出装置を鋼管搬出方向に移動させることで行うことができる。
ここで、上記鋼管搬出装置の移動手段(駆動源)については、特に制限はなく、例えば、モータなどの動力源に接続されたチェーンあるいはベルト等によって駆動するようにしてもよい。
<金型の取り外し>
図5および図6を用いて、金型の取り外し方法について説明する。
・ステップ1:空の金型台車10を、台車置場から鋼管搬出ライン16上に搭載する(図5(a)))
・ステップ2:鋼管搬出装置17を金型台車10の位置まで移動させ、連結する(図5(b))。
・ステップ3:鋼管搬出装置17で、金型台車10をプレス機7のパンチ2直下まで移動する(図5(c)、図6(a))。
・ステップ4:金型台車上部の金型収納部12を油圧ジャッキ15で上昇させ、収納部内の金型台13とパンチ先端の金型5とを当接させる(図5(d)、図6(b))。
・ステップ5:固定ボルト6の締結を解除し、パンチ先端(ビーム先端)から金型5を取り外す(図5(d)、図6(c))。
・ステップ6:金型収納部12を金型5とともに降下し、金型台車基部11上に受ける(図5(e)、図6(d))。
・ステップ7:鋼管搬出装置17で、金型台車10をプレス機外に押出して、鋼管搬出ライン16上に載せる(図5(f))。
・ステップ8:金型台車10を、鋼管搬出ライン16から撤去する。
次に、金型の取り付け方法について説明する。なお、この方法は、先述した金型の取り外し方法と、ほぼ逆の順序で行えばよいので、説明図は省略する。
・ステップ1:新たな金型5を載置した金型台車10を、鋼管搬出ライン16上に搭載する。
・ステップ2:鋼管搬出装置17を金型台車10の位置まで移動させ、連結する。
・ステップ3:鋼管搬出装置17で、金型台車10をプレス機7のパンチ2直下まで移動する。
・ステップ4:金型台車上部の金型収納部12を油圧ジャッキ15で上昇させ、収納部内の新たな金型5の溝部8とパンチ支持体4(ビーム)先端とを嵌合させる。この際、金型の幅方向位置は、金型台13の位置調整ボルト14を用いて微調整を行う。
・ステップ5:固定ボルト6を締結し、金型5をビーム4の先端に取り付ける。
・ステップ6:金型収納部12を降下させ、金型台車基部11に受ける。
・ステップ7:鋼管搬出装置17で、金型台車10を押出し、鋼管搬出ライン16上に載せる。
・ステップ8:金型台車10を、鋼管搬出ライン16から撤去する。
その結果、本発明例の金型交換時間は、従来技術の比較例に比べて約1/3近くまで短縮することができた。
1:素材鋼板
2:パンチ
3:ダイ
4:パンチ支持体(ビーム)
5:金型
6:固定ボルト
7:プレス機本体
8:嵌合溝
9:スペーサー
10:金型台車
11:金型台車基部
12:金型収納部
13:金型台
14:位置調整機構(位置調整ボルト)
15:昇降機構(油圧ジャッキ)
16:鋼管搬出ライン
17:鋼管搬出装置
18:平行ピン
Claims (9)
- 1対のダイと該ダイ間を昇降するパンチとでダイ上の鋼板を曲げ加工するベンディングプレス機におけるパンチ先端の金型交換方法であって、
上記パンチ直下への金型の搬入および上記パンチ直下からの金型の搬出を、上記1対のダイ間をパンチの長さ方向に移動可能な金型台車に載置して行うことを特徴とするベンディングプレス機における金型交換方法。 - 上記金型台車のパンチ直下への搬入およびパンチ直下からの搬出を、上記プレス機に配設された鋼管搬出装置を用いて行うことを特徴とする請求項1に記載のベンディングプレス機における金型交換方法。
- 上記金型台車の金型収納部を上昇させ、パンチ先端に当接した状態で、パンチ先端からの金型の取り外し、および、パンチ先端への金型の取り付けを行うことを特徴とする請求項1または2に記載のベンディングプレス機における金型交換方法。
- 上記金型収納部内の金型台に載置した金型のパンチ長さ方向と直交する方向の位置調整を、金型を載置したまま上記金型台を移動させることにより行うことを特徴とする請求項1~3のいずれか1項に記載のベンディングプレス機における金型交換方法。
- 上記金型が複数のセグメントに分割されているときには、上記金型の交換を一括して行うことを特徴とする請求項1~4のいずれか1項に記載のベンディングプレス機における金型交換方法。
- 複数のセグメントを、シムで連結した複数のセットに分け、該セット単位で金型台車への積み降ろしを行うことを特徴とする請求項5に記載のベンディングプレス機における金型交換方法。
- 1対のダイと該ダイ間を昇降するパンチとでダイ上の鋼板を曲げ加工するベンディングプレス機におけるパンチ先端の金型交換に用いる金型台車であって、
上記ベンディングプレス機に設置されたプレス加工後の鋼管を搬出する装置で、上記1対のダイ間をパンチの長さ方向に移動可能としてなることを特徴とするベンディングプレス機における金型交換用の金型台車。 - 金型を収納する金型収納部を有するとともに、上記金型収納部を昇降する昇降機構を有することを特徴とする請求項7に記載のベンディングプレス機における金型交換用の金型台車。
- 上記金型収納部に収納した金型のパンチ長さ方向に直角な方向の位置調整を、金型を載置した金型台ごと行う位置調整機構を有することを特徴とする請求項7または8に記載のベンディングプレス機における金型交換用の金型台車。
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